Filling nozzle for liquids with automatic limitation of the level of the liquid and automatic resetting



Oct. 31, 1950 E. PIQUEREZ 2,527,760 FILLING NOZZLE FOR LIQUIDS wrmAUTOMATIC LIMITATION OF THE LEVEL OF THE LIQUID AND AUTOMATIC RESETTINGFiled June 28, 1945 ,Z'nvenZon ImiZe lyaerez z? mweys fiatentelzl Oct.

FILLING NOZZLE FOR LIQUIDS WITH AUTO- MATIC LIMITATION OF THE LEVEL OFTHE LIQUID AND AUTOMATIC RESETTING Emile Piquerea, St. Cloud, France,assignor to Societe ditez' Paris, France Tecalemit, Soeiete Anonyme,

Application June 28, 1945 Serial No. 602,111 1 In France January 13,1944 Section 1, Public Law 690, August 8, 1946 Patent expires January13, 1964 In engineering, it is often necessary,'when-.filling reservoirsor receptacles with a liquid by means of pipes, to ensure an'automaticlimitation of the filling height.

This result can be obtained in different ways, for example, by makinguse of the momentum of the flow of liquid on more or less complicatedreversing devices for closing the closure member. In particular, it isknown to secure the closing of an admission valve or of a similar memberby means of a reduction of pressure formed by a suction member, forexample, a liquid jet device composed of an injector and a nozzle,operating by reason of the passage of the liquid. Devices of this kindare described in French Patents No. 804,710 of July 25, 1935, in thename of Emile Piquerez for Automatic limiting device for the filling ofall'rs'ervoirs, cisterns, etc. and 837,673 of'October 29; 1937, in thenameoi Emile Piquerez forz Fillin'g apparatus for all reservoirs with Iautomatic limitation of the liquid'level.

During the operation of these devices, the passage of the liquid in thesuction member must not produceany substantial reduction of pressurebut; at the moment whenthe level of the liquid in the' reservoirreachesthis suction member, a. reduction of'pressure issuddenly produced and ismade use of ier producing "closin'gof the closure member. Apparatus ofthe type in question are also known in which the suction member iscombined witha'nother conduit connected to the liquid supply and closedin the position of rest by suitably loaded exhaust valve which opensautomatically as soon as the pressure inthe liquid conduit has reached acertain value; in this-manner the suction member always has a sufiicientflow to enable it to-work properly, the flow surplus -flowingdirectly',thr'ough the said conduit, when the pressurerises= above'theforce by which the exhaust valve isloaded.

In' this latter type of apparatus, described in French Patent No.855,052 of January 12, 1939, in' the name of the present applicant, for:Self limiting filling apparatus, the operation is ensured in spite ofthe important variations in the flow, whereby an apparatus having alarge output, can

be designed'which retains its sensitiveness forvery smalloutputs; 7

Every limitingiapparatus of the above type-is constructed-so as:.to bemounted at the end of field of use of the limiting apparatus which must4 Claims. (Cl. 226127) always remain accessible, or the resetting ofmust be remotely controlled.

The object of the invention is to provide a limiting apparatus in whichthe resetting is effected in an automatic manner as soon as the pressureis removed in the-replenishing pipe and which can therefore bepermanently mounted On the reservoirto be filled, even at aninaccessible point.

In order to ensure closing of the closure mem ber, the filling devicewith automatic limitation of the liquid level, according to theinvention, makes use of a suction member through which which passes atleast a portion of the liquid and producing, when the predeterminedlevel is reached, a reduction-of pressure which acts on a movable wallcontrolling the'locking device of the closing member. It is notable thatthis closing member is subjected to the action of the liquid pressureactingin the direction of closing and to a resilient oppositelyactingforce acting in the direction oif In a preferred and exemplaryembodiment of v the new limiting device:

The closure member is subjected, in the opposite direction to the fluidpressure, to the action of a' spring controlling the exhaust valve. Adamping movable wallchamber and the reservoir to be outside the ,passageof the liquid. Other advantages and characteristics will side thereservoir to be filled.

, In thisa'pparatus, which is of the type by-means 1 of which it ispossible to obtain a'precises limita-, tion of level with widelydifferent outputs, the closuremember l is mounted in such a manner thatit can slide axially inaboring'z oi the body; 3 ofthe limiting device;whilst the suction mem-f ber, composed in knownfmanner, of the' injectorland the nozzle 5,;is itself fixed, co-axially, in a rear wall 6 ofthebody 3 exhibiting openings 1,

' for'the' passage of the replenishing liquid.

The 'body 3 is provided, at its front portion-{ pear from thedescription about to be given in. reference to the accompanying drawing,given by: way of example, in which the sole figure shows, in axialsection a limiting device according to the? invention arranged along a-horizontal plane intween the space 9 situated between the injector; 4and the nozzle 5 on the one hand, and the chamber 18 provided with themovable wall II. The movable wall H carries, on the side opposite thechamber H), a finger H? for locking the closure member 1. The saidmember I is provided, for this purpose, with a shoulder 13 hearing onthe side surface of the finger i2 and a reduced diameter portion Hi theend 15 of which constitutes the seat of the exhaust valve 66. This valveit is slidably mounted on the tail H of the injector 4 and is subjectedto the action of a resilient force, in the present case to the force ofa coil spring !8 bearing on the rear wall 6 oi the body 3 limitingdevice The body 3 of the limiting device is provided with a flange iiltoenable it to be secured to one of the walls 2d of the reservoir R- to befilled.

Onithe rear Wall 6 of the body3 of the limiting devicev is mounted aduct .21 enabling air to be exchanged between the duct 8, putting intocommunication the space 9 andthe reduced pressure chamber I6 having themovable wall, and the atmosphere of the reservoir R, with a View tomaintaining the pressure prevailingin the depression chamber iflandthereservoir R at the same value, even in the casewhere the suction memberpro duces an undue reduction oi pressure in the said chamber, forexample in the event of an air ocket ur n at t eo i of h c r 4-..

It should be pointed out that the duct 2i is not shqwa e m nvins dr in eDQ- s ition which it shouldractually occupy. In the example shown, thelimiting device is arranged si ns. a h ri t ane and ed i ti s ii' ates,in eal t t ese-me o iz nta lass a the suction member 4--5 so that it issubmerged atlthejsametime as thejlatter, when the predereservoir R. Aduct 22'isfalso secured to the fixedrear; wall d amet r-5 a 1 7reservoir R and the equalization chamber lj of -.Qn t e s e o p s timerea fwall ,6. e

and fan inner washer 43havi'ng a diametersuch that it can move.axially'with slight play inside the chamber 26. The innerwashe'r 43 isprovided- With a number of apertures 28. The outer Washer 21 is held bya shoulderat the end-of a tail 29 fixed with respect to the closingmember I, whilst the inner washer 43 is mounted, with axial play,between the outer washer 27 and a Washer 38 held by a shoulder On thetail 29.

fThe members 21 2B, and "are combined so asgto operate after the'fashionof a dashpot for hydraulically braking the movement of thestop"? member! when itis unlatch'edlf V The edge 24 and the bot'tomf2 5,situatedon the same vertical plane, serveasbearing surface for the outersurface of the wall 3] of the closing member I. This latter, in the formof acylindritermined filling level N hastbeen reached irrthe 4 calslide' valve, has in its side wall, openings 32 for the ingress of theliquid, The bottomj'25 is provided with an extending flangeportion'wh'ich, onthe'inmr side, forms a bearing surface 44 which bears,in the closed position of the closure member I, against the seat 42 ofthe body 3 of the limiting device.

of the I JA deflector 33. is disposed at the outlet of the limitingdevice. in order to maintain the suction member outside the passage ofthe liquid. Finally, a connection pipe 34 is provided for receiving thefeed pipe for the liquid to be transferred. According to the drawing,this is a right angled connection pipe mounted on the flange IQ ofthebody'3 of the limiting device.

When proceeding to the filling of the reservoir R, the limiting devicewith all its parts in the position as shown in the drawing, theoperation is as follows:

The free end of the feed pipe is filled to the inlet .3 5 of theconnection-pipe 3,4. and theliquid under pres'sureis allowed tov flow inthe directioni ofthe, reservoir R. V

As soon as the liquid reaches the.limiting,.de'-.

. vice, it enters, through the openings 32,- inside theclosuremember l,.Theiactual pressureoisthe". liquid then acting on the difierence betweenthe; areas existing between the outlet valve [6 and the; stopmembei; I,which is, now released, carries the latter-along and ittends to.strikeabruptly against, the sea-i142. It is at this instant that the,shock; absorber comes into play, said shock, absorber be: ingconstituted of the hydraulic device 26, 21, '43 th -pu pos of wh ch istc-retard-th cl sureand preventthe water-hammer blows which wouldbe:produced if -the closure weresudden. 1 D e, tofih y preva insbetwe t ebore, of: he ch mb 1 a d t e. outer-washer 21. the. ui a, ur nsa efiowgwl sli ht y: m vest s; nn ash r 43; (Whichhears as i tthe'w her, 30) and,as it passes through-the apertures lil fill the axial chamber 26.

n s, th e unlatched stop member moves abruptly tcwardstn right,as;viewed.inthe drawing, its movement is braked hydraulically by theliquid-j stesse e heha r? andw i can-onl eases? le l h h the ar qusl aeee at s pres nt; b tween the 'rnembers of the hydraulic brels issi i a.

ess Ts t an r s ,Eithe},the. f low is a weak one, the pressureof; which;is not suificiently high to, dislodge from its; seatifi ltheexhaustvalve 5 subjected to the "force. oi thespring l,-8 and in thisfirstcase, the .liquid ilows into .thelreservoir through, thesuction membe'-,5. f i

O' "liquid pressure (large o l ipl tsi exrieeds; bs-i s i hs ri 1 8. whihna r; ea; hasst al. .7 B mo es w y qm sis; s at. 1.5. nd i, the excessliquid passes directly into the reserei -Bf h li h i gnas s a h beds-s 3o th i t vi wh shan ase ocated by:

the dei lectop33, at a lowerg-levelthan the suction member 4-5. c st avhe e m ersfirs. and being submerged-in the-gush caused byi bsngre the i:Inbo bi a es;themes. ure filisa ui ct iom he closure member n?prevented from moving by theelncigsji until the predetermined levelzN-coi ,fillingis reached, fyWh en gthe reservoir R. iszfilled'tto''aipredetere' mined vel; the limiting device occupiesv the ,clos- .11zllqfilt qllawifih the support surface. 445 bearing i against the-seat4.2.150 long asipressureis main tained: ftheinletpipe:(not shown) Assoon-as l 75, thepressnre dies '.do.wn',;ithel movable unit com posed ofthe stop member I and the outlet valve I6 is brought back, solely by theexpansion of spring I8, to the position shown in the drawing and the lugI2, which is integral with the movable wall H, under the action ofspring 45 as it expands, resumes the position in which it latches thestop member I. The resetting of the limiting device is thus insuredwithout requiring any manualoperation and the apparatus thus consti-'holding said closure in open position when the liquid is below apredetermined level, a diaphragm connected with said latch, a suctiondevice having an inlet located in the flow of liquid in the chamher andan outlet in the vessel, a duct connecting the suction device to oneside of the diaphragm, and a deflector for deflecting the liquid flowinginto the vessel from said chamber away from the outlet of the suctiondevice.

2. Control mechanism for controlling the level of liquid in a vesselcomprising, a casing having an inlet and an outlet through which liquidflows to the vessel, the outlet being located in the vessel at theliquid level to be maintained, said casing having a bore formed thereinand a closure seat at its forward end, a slidable cylindrical closuremember in said boreand having a closed forward end provided with aflange for engaging the closure seat when moved rearwardly into closedposition, said closure member having a valve seat located at its afterend and encompassing a smaller area than the closure seat, a valvelocated adjacent said valve seat, spring means tending to press saidvalve forwardly into contact with the valve seat and thus slide theclosure member to open position, a suction device having an inlet opento flow of liquid in the closure member, having an outlet into thevessel, and 7 having an intermediate reduced pressure chamber, adiaphragm adjacent the casing, a latch connected with said diaphragm,spring means tending to press the diaphragm toward the closure member tohold the latch in position to latch the closure member in open position,a duct connecting the reduced pressure chamber of the suction devicewith the side of the diaphragm opposite the latch, a second ductconnecting said first duct with the vessel at the liquid level to bemain! tained, a third duct connecting the latch side of the diaphragmwith the vessel at a higher level than the second duct, and a shieldextending partially across the outlet of the casing for main-- tainingthe suction device outside the liquid passing out of the chamber,whereby when the liquid in the vessel reaches the level of said secondduct and obstructs gaseous flow therethrough, the suction deviceabruptly creates a reduced pressure on one side of the diaphragm andwithdraws the latch from the closure member, thereby permitting theclosure member to close under the influence of the flowing liquid, andthen to automatically open under the influence of the valve spring whenthe flow has stopped.

3. In an automatically operating liquid levellimiting filling apparatusfor filling a container to a predetermined level, a tubular casing forextending downwardly into the container and serving as a conduit forsupplying liquid to said container, said casing having an inlet forliquid and a plurality of openings leading into the container, at leastone of said openings leading into the container having a shape whichgenerates a reduced pressure forwardly thereof by the flow of liquidtherethrough, a pressure responsive movable wall subjected on one sideto the said reduced pressure, one of said openings leading to thecontainer having a tube extending into the container and being connectedto the said one side of said movable wall to relieve said reducedpressure when the liquid level is below the predetermined level butbeing closed by the liquid when it reaches the predetermined level,valve means in said tubular casing influenced to closed position by theflow of liquid through the casing, said movable wall having a latchengaging said valve means to latch the valve means in open positionbefore the level of liquid has attained said predetermined level, springmeans for pressing said movable wall and latch means into position tohold said valve means open, whereby when the liquid level in saidcontainer reaches the predetermined level the opening into the containerwhich is connected to the said one side of said movable wall is closedby the liquid and the relief of the reduced pressure is no longereffected, whereupon the reduced pressure becomes efiective to move themovable wall and its latch into a position to allow the valve means,under the influenceof the flow of liquid, to move into closed positionto close ofi the flow of liquid into the container.

4. An automatically operating liquid level-limiting filling apparatusaccording to claim 3 and in which another of said openings leading intothe container is provided with a tube extending into the container andterminating in the container at a level higher than that at which thetube of said one opening extends, said other opening is connected to theother side of said movable wall so as to supply pressure thereto forassisting in moving said wall and its latch into releasing position.

EMILE PIQUEREZ.

REFERENCES CITED The following references are of record in the file ofthis patent: V

UNITED STATES PATENTS Number Name Date 2,271,557 7 Killman et a1 Feb. 3,1942 2,326,251 Piquerez Aug. 10, 1943 2,388,852 Killman Nov. 13, 1945

